Question

If the field lines in a magnetic field are parallel and equidistant, the magnetic field is __________ .

• A. $uniform$
• B. $nonuniform$
• C. $zero$
• D. can not be determined

Answer 1

Answer: (A)

$uniform$

The close continuous curves in a magnetic field are called magnetic lines of force. Curved lines are used to represent a magnetic field, drawn such that the number of lines relates to the magnetic field's strength at a given point and the tangent of any curve at a particular point is along the direction of magnetic force at that point.
The magnetic lines of force are uniform and strong at the center or middle and they diverge as they move towards the ends and the distance between the lines increases. Eventually, the strength of the magnetic field is strong where the lines are closer and they weaken as they closeness decreases. Hence, if the field lines in a magnetic field are parallel and equidistant, the magnetic field is uniform.